phenology Syllabification: (phe·nol·o·gy)Pronunciation: /fiˈnäləjē/Definition of phenology noun the study of cyclic and seasonal natural phenomena, especially in relation to climate and plant and animal life. Derivatives phenologicalPronunciation: /ˌfēnəˈläjikəl/ adjective Origin: late 19th century: from phenomenon + -logyphenology in other Oxford dictionaries Definition of phenology in the British & World English dictionary